Abstract
Ultralow carrier concentrations of two-dimensional holes down to p=1×109cm-2 are realized. Remarkable insulating states are found below a critical density of pc=4×109cm-2 or rs≈40. Sensitive dc V-I measurement as a function of temperature and electric field reveals a two-stage phase transition supporting the melting of a Wigner solid as a two-stage first-order transition.
Original language | English (US) |
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Article number | 085135 |
Journal | Physical Review B |
Volume | 97 |
Issue number | 8 |
DOIs | |
State | Published - Feb 20 2018 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics